I can argue that this is a feature request, a bug, or just an observation that users will be confused when Create Caption Presets are imported.
Caption Track Styles are now correctly SAVED with a Create Captions Preset via the 3 dot menu in the Create Captions dialogue. Saved Presets are automatically added to an "Auto Captioning Presets" Folder in the Project Panel.
But when EXPORTED (via the 3 dot menu in the Create Captions dialogue - "Export Current Settings as Preset"), the .prcaptionspreset file contains no Caption Track Style information and is therefore not imported with a preset.
The Workaround is to copy/paste such a preset between projects, but this requires both projects to be open.
If the Caption Track Style in the Preset is not in the Project, it is ignored, and None is shown. I have not tested whether "none" (a PR default which has an unknown source) is actually used.
It is also inconvenient that you cannot export multiple presets at once.
Ideally, I suspect, it would be better to make the preset part of the .prtextstyle system.
The .prcaptionspreset file that is exported contains the settings active at the time of the save, not the settings in the Preset that is in use. Once saved, the settings shown revert to the Saved preset, not the Exported preset.
System info Application: Premiere Pro (Beta) v220.127.116.11 OS: Windows v10.0.19045, RAM: 63.80 GB GB, CPUs (logical): 16